Re: BLDC Motor for free EV stoff, also what an array of exciting EV vehicles

[jb <jbenditt@rovin.net>]

Rod and everyone!

I appreciate the offer! Thank You! But, I'm really interested in
commercially available motors, unless the motor your willing to share
with me will be put into production and have competitive operational
characteristics. Or unless it is one of those real special very rare
motors we hear about from time to time, you know the ones that do not
use batteries or have wires to plug in!-)

Doing a small production run on this vehicle as a recumbent bicycle.
Have jigs, tooling and a shop. Three of these bike should be completed
very soon, another run of 7 units to follow. Later amphibious and
electric options will be made available.  If I'm going to get this
business off the ground can't be playing with one off motors unless
we're going to manufacture them! 

The amphibious recumbent bike is my business start, next vehicle is a
very exciting 3 wheeled human electric powered amphibious commuter
vehicle. Have very limited resources so the vehicle is un-built until I
have the funds and the time to  build it. 

If your reading this and thinking about being involved in an EV
business. I believe, I have a line of products that can fill every EV
notch market and create new markets, with this strategy  develop a
highly innovative and very competitive EV manufacturing business!

To the Group: I linked to some of your web sights, what an array of
electric vehicles. Bikes cars tractors all shapes and styles from home
built to factory built! The people on this list reminds me a little of
the EEVC Eastern Electric Vehicle Club in Philidelphia. It is where I
picked up my background in Electric Vehicles. 

Once again, thanks for the offer! 

John Benditt

954 396 9949

  





JB,
I have been known to send EV stuff for free
if the end user will utilize it for a real
project.  You have some pretty interesting
bikes, so I might consider sending one of my
prototypes for your project.  Many times prototype
electronics are scrapped or left in the basement because
they are not production worthy.
I have always saved my prototypes in the hope someone
can use them for something usefull (IE. recycling).
I believe some of my prototypes could be well used in
EV applications.
Rod

jb wrote:

> Hi Rod and everyone! 
> 
> Just trying to figure out your motor. 
> 
> What kind of motor is it?  What is the overall efficiency? Like to see 
> curves and more indept information, especially why your motor could be
> better for my application than a Transmagnetic motor.
> 
> Heard about work on inverted motors with a magnets on rotor giving some
> nice characteristic, but that was many years ago.
> 
> Transmagnetec 1 HP motor is 2.75" long by 4" round and has known proven
> performance characteristics. The first belt reduction is 0.8" and still
> gives me a nicely place output shaft, a  single bicycle chain can be
> used, like on my Second Prototype. 
> 
> It is still a hassle to change the bike from land to water use. It is
> mush better to drive right onto the water without stopping a feature of
> my next three wheeled human electric commuter vehicle project. My first
> prototype this basic design was incorporated in my Fifth Prototype.
> Never finished the amphibious body or the computer controlled reverse
> cog enclosed chain transmission system. Had computer operational in a
> test jig. I simply ran out of money on project in 1990!  
> 
> 
> Sincerely
> 
> John Benditt
> 
> 
> 
> 
> 
> 
> 
> 
> 
> My web page shows my internal control and has it incorrectly
> labeled as a brush DC.
> This control is actually a trapezoidal BLDC for a 3-phase Y connected
> motor.  Regen is accomplished by providing a signal to the control 
> (+24V) that indicates you would like to brake.  At this point
> the control looks at the current PWM duty cycle to determine how
> much starting brake PWM to apply.
> 
> I PWM the three low side switches and moniter the brake current and bus 
> voltage.  If either one exceeds a preset limit, I reduce the PWM.
> 
> Regarding motor length.  The one I mentioned is 8" in length, but I have
> other one's that are larger diameter and shorter.
> In particular, a 4.5" length, 3.5" diameter with Neodyneum rotor would
> be perfect for a bike.  It requires an external control, but I also 
> designed one of those with a 3.5 x 3.5 x 2" tall footprint.  This
> external control can go above 1hp and has more features than the
> internal control.  The external control can go up to 48V inputs.
> 
> I also checked out your web page.
> Pretty cool looking bikes, especially the amphibious one (that would
> be perfect for me since Portage Lakes is a 1/4 mile down the street).
> 
> Rod
> 
> jb wrote:
> 
> 
>>Hi Rod and everyone.
>>
>>Maybe we could do something. 
>>
>>Checked out your websight looked at your van and cars and scooters. 
>>
>>Must say, I'M VERY IMPRESSED! 
>>
>>Your motor discussed on this list seems to be a shunt wound motor of
>>sorts but with electronic logic for setting up proper fields at the
>>right time to get some neat motor characteristics. 
>>
>>
> 
>